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Communication: Quantum molecular dynamics simulation of liquid para-hydrogen by nuclear and electron wave packet approach
1. D. Scharf, G. J. Martyna, and M. L. Klein, Low Temp. Phys. 19, 364 (1993)
1.D. Scharf, G. J. Martyna, and M. L. Klein, [Fiz. Nizk. Temp. 19, 516 (1993)].
5. F. J. Bermejo, K. Kinugawa, C. Cabrillo, S. M. Bennington, B. Fak, M. T. Fernandez-Diaz, P. Verkerk, J. Dawidowski, and R. Fernandez-Perea, Phys. Rev. Lett. 84, 5359 (2000).
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Liquid para-hydrogen (p-H2) is a typical quantum liquid which exhibits strong nuclear quantum effects (NQEs) and thus anomalous static and dynamic properties. We propose a real-time simulation method of wave packet (WP) molecular dynamics (MD) based on non-empirical intra- and inter-molecular interactions of non-spherical hydrogen molecules, and apply it to condensed-phase p-H2. The NQEs, such as WP delocalization and zero-point energy, are taken into account without perturbative expansion of prepared model potential functions but with explicit interactions between nuclear and electron WPs. The developed MD simulation for 100 ps with 1200 hydrogen molecules is realized at feasible computational cost, by which basic experimental properties of p-H2 liquid such as radial distribution functions, self-diffusion coefficients, and shear viscosities are all well reproduced.
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